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arXiv 1005.2453hep-thgr-qcmath-phmath.MP
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四维量子引力中的顶点算符CFT

Vertex Operators in 4D Quantum Gravity Formulated as CFT

Ken-ji Hamada

摘要:

研究了量子引力下的四维共形场论中的顶点算子,其动力学性质由Riegert的Wess-Zumino作用量和Weyl作用量控制.共形对称在紫外极限下等同于自同构对称,它混合了引力场的正度规模和负度规模,因此这些模不能在物理算符中分开处理。在本文中,我们构造了引力顶点算子,如Ricci标量,定义为它们的时空体积积分在共形变换下是不变的。计算了这些算子乘积的短距离奇异性,并证明了它们的系数具有物理正确的符号。此外,我们还证明了,即使在由宇宙学常数顶点算子扰动的系统中,如Cursons和Thorn所示的Liouville理论的情况下,共形代数也成立。

英文摘要:

We study vertex operators in 4D conformal field theory derived from quantized gravity, whose dynamics is governed by the Wess-Zumino action by Riegert and the Weyl action. Conformal symmetry is equal to diffeomorphism symmetry in the ultraviolet limit, which mixes positive-metric and negative-metric modes of the gravitational field and thus these modes cannot be treated separately in physical operators. In this paper, we construct gravitational vertex operators such as the Ricci scalar, defined as space-time volume integrals of them are invariant under conformal transformations. Short distance singularities of these operator products are computed and it is shown that their coefficients have physically correct sign. Furthermore, we show that conformal algebra holds even in the system perturbed by the cosmological constant vertex operator as in the case of the Liouville theory shown by Curtright and Thorn.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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